KR101940201B1 - Side airbag device for vehicle - Google Patents

Abstract

Provided is a side airbag device for a vehicle which can protect the shoulder portion with a shoulder protector and a chest protector, and can protect the chest protector with a gentle lifting portion without raising the arm portion if necessary according to the collision state do. When the side airbags 1 are installed on the seat 2 and are spread flat in the unexpanded state, the outer shape of the side airbags in front of and behind the vehicle body is formed in the shoulder- And a lower side line (L) directed downward from the curved portion and having an upward curved line portion (U) upwardly directed from the curved portion and having a curved portion (C) The bent portion is positioned above the front or center line of the shoulder protecting portion with respect to the center line F divided into upper and lower portions extending along the longitudinal direction of the upper arm portion of the rider P, And is positioned lower than the center line at the lower end position Au of the upper arm portion of the rider.

Description

Side airbag device for vehicle

The present invention relates to a side airbag device for a vehicle, which includes a shoulder protector and a chest protector, and protects the shoulder part with a shoulder protector while protecting the chest part appropriately according to the type of impact.

Among the side airbags for automobiles, there are many known techniques for taking measures against shoulder or brachial. In the 'airbag of the side airbag device' of Patent Document 1, the airbag is disposed on the rear side, and includes a base portion which is on the upstream side of the expansion gas and a main body portion which is disposed on the front side of the base portion when expanding and expanding. The body portion is provided with a concave portion recessed rearward at a position corresponding to the vicinity of the shoulder portion of the rider during the inflated and expanded state and extends from the base portion to the bifurcate with the base portion intersecting, And a lower and an upper expansion part arranged on the side of the head part. A tether on the inner side of the vehicle and a side of the vehicle outer surface are disposed and installed inside the base. The minimum opening area of the upper flow path on the upper side of the tether is set to be smaller than the minimum opening area of the lower flow path on the lower side of the tether.

In the "side airbag device" of Patent Document 2, the side airbag device is deployed so that the folded airbag is deployed on the vehicle outer side of the seatback. The airbag has a base portion that becomes the upstream side of the expansion gas at the time of inflating and expanding and a main body portion that is disposed at the front of the base portion at the inflating and expanding. The body portion has a lower expanding portion disposed in front of the base portion at the time of inflating and expanding and an upper expanding portion communicating with the upper portion of the lower expanding portion. The airbag is folded and folded into an inner roll folded inwardly of the vehicle so as to approach the base side from the upper side by making a radial fold line about the base upper position while the airbag is flatly expanded have. In Patent Document 2, even if the arm of the rider is disposed near the rim of the seat back, the airbag can be deployed and expanded without interfering with the arm of the riding rider through the positional shift toward the vehicle exterior.

In the 'vehicle side airbag device' of Patent Document 3, the airbag is located at a position lower than the side of the rider's front side of the shoulder restricting portion than the shoulder restraining portion, and has an arm support frame on which the upper arm portion of the rider is placed. Therefore, when the airbag is deployed and the upper arm of the rider touches the airbag, the upper arm of the rider slides up along the airbag and is put on the arm support rim. Therefore, compared with the conventional one, the amount of lap between the upper arm and the chest of the rider can be reduced when viewed from the vehicle width direction, and it is possible to prevent the upper arm of the rider from interposing between the chest of the rider and the airbag.

The side airbag of Patent Document 4 is a side airbag deployed and inflated between the rider and the door trim on the side of the seat and is formed to expand and deploy from the waist portion to the side of the rider in the vehicle vertical direction, And an inclined surface inclined downward from the rear of the vehicle toward the front of the vehicle along the lower side of the upper arm of the rider at the upper portion thereof.

The 'side airbag device' of Patent Document 5 protects the passenger's vehicle between the passenger's side and the vehicle's side wall by the airbag protecting the lower body below the shoulder. The airbag has an expanding portion and a three-dimensional portion formed by joining opposite base cloths. Opposing bubbles are formed at positions overlapping each other in a part of each peripheral edge portion and have a pair of notched portions joined in a state of extending in the thickness direction of the expanding portion. The three-dimensional shape portion is located in the peripheral portion of the expansion portion, and is formed three-dimensionally in the thickness direction of the expansion portion by a pair of notched portions joined. In Patent Document 5, since the airbag is deployed laterally of the body, it is possible to prevent the airbag during deployment from causing the upper arm of the rider to jump.

The side airbag device of Patent Document 6 is a side airbag device having an airbag deployed in a space between a rider and a driver sitting on a seat at the time of a vehicle side collision and an inflator for supplying gas to the airbag, A second chamber which is supplied with gas supplied to the first chamber and deploys below the upper arm portion of the rider, and a second chamber which is installed below the second chamber; And the third chamber is supplied with the gas supplied to the second chamber and is deployed.

The side airbag of Patent Document 7 provides a side airbag capable of sufficiently absorbing an impact directed toward the chest while suppressing pressing of the arm portion due to expansion due to expansion, And the arms are opposed to each other in a concave shape, and at the same time, the arms are pushed up to a position not overlapping the rider's chest.

In the side airbag device of Patent Document 8, in the side airbag device, the main back portion of the side airbag first inflates and deploys toward the rear side of the vehicle in the upper arm portion of the occupant, and the rear side airbag is deployed between the shoulder portion, At the same time as the interposition, the unsealed sub-back part faces the back of the upper arm. The sub back part is expanded by expanding and expanding the sewing part of the airbag as the internal pressure of the main back part is increased after completion of expansion and expansion, thereby pushing up the upper arm part. At this time, since the force from the airbag can be prevented from being applied to the chest (frame) through the humerus, the internal pressure of the airbag can be set based on the riding resistance of the rider.

Patent Document 1: Japanese Patent Application Laid-Open No. 2001-114060 Patent Document 2: Japanese Patent Application Laid-Open No. 2001-171468 Patent Document 3: JP-A-2010-132072 Patent Document 4: JP-A-2013-147119 Patent Document 5: JP-A-2013-216211 Patent Document 6: JP-A-2014-88073 Patent Document 7: Japanese Patent Laid-Open Publication No. 2011-087026 Patent Document 8: Japanese Patent Laid-Open Publication No. 2013-154786

When there is a collision against the vehicle body side such as the body of a vehicle door, the vehicle body side portion deforms due to pitting and the door trim or the like enters the inside of the vehicle body. At this time, the side airbag deploys and expands on the side of the rider to exhibit the ride-in protection function. As described in some of the patent documents, the arm portion of the rider is sandwiched between the chest portion and the inflated side airbag, There is a fear that the chest may be pushed to injure the chest. In order to avoid such a situation, various side airbags having a configuration in which the arm portion of the rider is lifted are proposed.

However, even in a collision situation in which the arm portion is not required to be lifted, the arm portion can be lifted due to completion of the deployment and expansion of the side airbag, which may increase the flying height of the rider. In other words, it has been sometimes desirable to protect the arm with a side airbag so as not to bounce.

It is also important to protect the shoulder portion of the rider, and it is desired to devise a side airbag capable of protecting both the shoulder portion and the chest portion by raising the arm portion if necessary.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a chest protection unit which includes a shoulder protector and a chest protector and protects the shoulder while protecting the shoulder, And it is an object of the present invention to provide a vehicle side airbag device capable of protecting the chest portion.

The side airbag device for a vehicle according to the present invention has at least a shoulder protecting portion for protecting a shoulder portion of a rider who is normally seated in the seat and a chest protecting portion for protecting the rider's bottom portion from below the shoulder protecting portion, And a side airbag deployed and inflated toward the forward and backward directions of the vehicle body between the seat and the seat side vehicle body member by the inflator gas, wherein the side airbag is installed in the seat and is not inflated The outer shape of the side airbag in front of and behind the vehicle body when viewed in the vehicle width direction of the vehicle body has an inflection part whose bending is changed in the middle from the shoulder protection part to the chest protection part , And the upwardly directed And a lower side line extending downward from the corresponding inflection point, wherein the inflection point extends along the longitudinal direction of the upper arm portion of the rider, as viewed from the vehicle width direction of the vehicle body, The lower side line intersects the upper side downward with respect to the center line and is positioned below the center line at the lower end position of the upper arm portion of the rider .

It is preferable that the side airbags are deformed by being pushed by the body member in which the displacement has occurred in the fully expanded and inflated state and the upward displacement is generated in the chest protection part extending at least at the inflection part to the lower side line by the deformation Do. And the lower side line may include a downwardly inclined portion toward the forward and backward directions of the vehicle body in the vicinity of the bent portion.

Preferably, the side airbag is designed according to the size of the experimental dummy doll on the assumption that the rider is the experimental dummy doll. And the bent portion is set near the lower end of the shoulder protecting portion. Preferably, the upper side line includes at least a first curve that reaches the curved portion, and the lower side line includes at least a second curve that reaches the curved portion.

The outer shape of the side airbag is preferably formed by a sewing line forming the side airbag. The sewing line is preferably a ridge line which appears convex when the side airbag completes the expansion and expansion.

It is preferable that an inner bag is provided in the side airbag and the inflator is arranged rearwardly in the longitudinal direction of the vehicle so that a main part of the inner bag is located inside the seat when the inflator is inflated and the inflator is installed inside the inner bag.

It is preferable that the inner bag directs a flow of the inflator gas filled inside when the rider is in an abnormal position to a vent hole formed in the side airbag. It is preferable that the inner bag is formed in a vertically elongated shape along the vertical direction of the vehicle body and in a shape extending downward in the longitudinal direction of the vehicle body.

The side airbag device for a vehicle according to the present invention includes a shoulder protector and a chest protector, and protects the shoulder part with a shoulder protector, while gently lifting the arm part (upper arm part) You can protect your chest.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of a vehicle side airbag apparatus according to the present invention as viewed from the vehicle width direction of a vehicle body when a side airbag is deployed flat on a seat without being inflated. Fig.
Fig. 2 is a front view of the side airbag shown in Fig. 1 when the door of the vehicle body does not cause the displacement, as seen from the front to back direction of the vehicle body in the unfolded and expanded state.
Fig. 3 is a side view of the vehicle body in the vehicle width direction, in which the inflated and deflated state of the side airbag shown in Fig. 1 is indicated by a chain double-dashed line.
Fig. 4 is a front view of the side airbag shown in Fig. 1 when the door of the vehicle body is displaced, as viewed from the front to back direction of the vehicle body in the unfolded and expanded state.
Fig. 5 is a side view of a vehicle body side airbag device according to the present invention when the side airbag is deployed flat on a seat without being inflated.
6 is a graph showing the temporal change of the inner pressure of the inner bag and the pressure of the side air bag when the inner bag shown in Fig. 5 is provided.

Best Mode for Carrying Out the Invention Hereinafter, a preferred embodiment of a vehicle side airbag device according to the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a side view showing a side airbag deployed on a seat and flatly deployed in a non-inflated state, viewed from the vehicle width direction of the vehicle body, and Fig. 2 is a side view Fig. 3 is a front view of the side airbag shown in Fig. 1 when the side airbag is fully deployed and inflated. Fig. 3 is a front elevational view of the side airbag shown in Fig. And FIG. 4 is a front view of the side airbag shown in FIG. 1 when the door of the vehicle body is displaced, as viewed from the forward and backward direction of the vehicle body, in the unfolded and expanded state of the side airbag.

As shown in Figs. 1 and 2, the side airbag apparatus for a vehicle according to the present embodiment has a side airbag 1. The side airbag 1 is installed in the seat 2 installed inside the vehicle body and is fixed to the seat 2 and the body member 3 on the side of the seat by the inflator gas, So as to protect the rider P against the impact input from the door side. The inflator gas is fixed to the seat 2 and is ejected from the inflator 4 accommodated in the side airbag 1.

The side airbag 1 has a shoulder protecting portion X (indicated by a circle in the figure) for protecting the shoulder portion of the rider P who normally seated on the seat 2, And a chest protection portion Y (shown in a range in which a dot (.) Is distributed in the figure) for protecting the chest portion of the rider P from below the shoulder protection portion X. In addition to having the chest protection portion Y And a waist protector Z for protecting the waist and the periphery thereof.

As is well known in the art, the side airbags 1 are formed by folding the peripheries of mutually opposing bubbles together by sewing or the like, and are deployed and expanded as the inflator gas is filled in the folded state.

The detailed description of the side airbag 1 to be described below is applied to the case of designing an experimental dummy doll assuming a boarding passenger P in accordance with the dimensions of the experimental dummy doll. As the experimental dummy puppets, for example, "Hybrid-III50th, Hybrid-III5th, Hybrid-III95th LM, BioRID-II, RID-2, SID, EuroSID-1, SID-IIs, ES- series, CRABI, Hy3Y0, Q3, Hy6yo, 3Y0, Pedestrian, FAA, WorldSID50th "are known. However, the side airbag 1 according to the present embodiment is not designed to be limited to these experimental dummy dolls but can be designed individually for each of the practical dummy dolls, and is specified according to the dimensions of each of these experimental dummy dolls . In the following description, the rider (P) and the experimental dummy doll have the same meaning.

As shown in Fig. 1, the outer shape of the side airbag 1 viewed from the vehicle width direction of the vehicle body is a state in which the side airbag 1 is fixed to the seat 2 and the inflator gas is not filled, And is defined by the following positional relationship when flatly deployed. Therefore, the side airbag 1 is different from the positional relationship according to the state in which the inflator gas completes the deployment expansion.

 (1) The outer shape of the side airbag 1, which is flatly deployed in the front-rear direction of the vehicle body, includes the inflection portion C, the upper side line U and the lower side line L. The upper side line U is positioned forward of the shoulder protection portion X in the vehicle front-rear direction. The lower side line L is positioned in front of the vehicle front-rear direction of the chest protection part Y. The upper side line U belongs to the shoulder protection part X and the lower side line L belongs to the chest protection part Y. [

The upper side line U and the lower side line L may be in a curved line or in a straight line in the vicinity of the curved portion C. The curved portion C is positioned at a middle position from the shoulder protecting portion X to the chest protection portion Y, that is, the position where the lower end of the upper side line U and the upper end of the lower side line L are connected.

The curved portion C refers to a state in which the upper side line U and the lower side line L which are different from each other in bending (inclination in the horizontal direction in the case of a straight line) are different from each other in the state of being bent , And refers to a portion where the bending (inclination) is changed by extreme change. The upper side line U is directed upward as the front edge of the shoulder protection part X at the inflection part C and the lower side line L is lowered as the front edge of the chest protection part Y at the inflection part C, .

 (2) For the upper arm (A) of the rider (P), the bent portion (C) is positioned as follows. The upper arm (A) refers to the arm portion from the shoulder joint to the elbow joint, and the longitudinal direction refers to the direction from the shoulder joint to the elbow joint. It is assumed that a center line F extending along the longitudinal direction of the upper arm portion A is assumed on the upper arm portion A in the vehicle width direction of the vehicle body and the upper arm portion A is located on the upper side As and the lower surface side At.

The bent portion C located in front of the vehicle in the forward and backward directions is located forward of the shoulder protection portion X and above the center line F when viewed in the vehicle width direction of the vehicle body. The inflection portion C is located forward of the shoulder portion of the rider P to be protected by the shoulder protection portion X and is located on the upper side As of the upper arm portion A of the rider P, In the vehicle width direction.

 (3) With respect to the upper arm (A) of the rider (P), the lower side line (L) is positioned as follows. The lower line L is positioned so as to intersect downward with respect to the center line F from above. Therefore, the lower side line L passes from the upper face side As to the lower face side At of the upper arm part A of the rider P, . The lower side line L is positioned lower than the center line F which is the lower end position (elbow joint position) Au of the upper arm portion A of the rider P as shown in Fig. As a result, the lower line L is latently located below the upper arm (A) at the elbow joint position.

The shoulder protector (X) prevents the shoulder protector (X) from flexing and the shoulder protector (X) so that the upward movement of the chest protector (Y) X).

In the present embodiment, the upper side line U includes at least a first curve that reaches the curved portion C, and the lower side line L includes at least the second curve that reaches the curved portion C, And the curvature radius of the curved portion C changes. As a result, a smooth expansion shape along the periphery of the curved portion C is secured.

The side airbags 1 may be formed in an appropriate shape such that the side airbags 1 are viewed from the vehicle width direction and the downward direction of the vehicle body connected to the lower side line L or the backward direction of the vehicle body is appropriately formed, At the upper side in the vertical direction, at least the shoulder portion of the rider P and the shoulder protection portion X are formed in a shape expanding to the periphery of the shoulder portion. It is preferable that the upper end of the shoulder protection portion X is set between the lower portion of the rider P and the upper end of the shoulder portion.

For example, the inflection part C is located between the shoulder rib 5 and the upper breast rib 6, and is located on the rear side of the vehicle body with respect to the front breast rib 6 in front of and behind the vehicle body. And the lower side line L is located between the shoulder rib 5 and the upper breast rib 6 under the center line F from the lower end position Au of the upper arm portion A and below the lower end position Au Is set to a value between.

A detailed description of the lower side line L includes a downwardly inclined portion 7 along the upper arm portion A as a convex shape toward the forward and backward directions of the vehicle body in the vicinity of the inflection portion (C). Since the downward inclined portion 7 is provided along the upper arm portion A, it can be latched under the upper arm portion A from the lower end position (elbow joint position) Au of the upper arm portion A when the side airbag 1 is deployed And smoothes the latent behavior of the bottom line (L).

The side airbag 1 does not inflate in a state where the side airbag 1 is installed on the seat 2 as shown by a solid line in Fig. , As shown by the chain double-dashed line, tends to expand and inflate in accordance with the fullness of the inflator gas, and to move slightly forward and backward of the vehicle body. Then, the side airbags 1 are pushed upward by the displacement generated in the vehicle body member 3 such as a door. Therefore, according to the above-mentioned (1) to (3), the side airbag 1 is not inflated in a state of being installed on the seat 2, The shape of the side airbag 1 is set.

It is confirmed whether or not the outer shape of the side airbag 1 in the forward and backward directions of the vehicle body described above satisfies the above-described conditions by the outer shape of the unfolded side airbag 1 set as described above.

The outer shape of the side airbag 1 is formed by a sewing line forming the side airbag 1. Thus, it is confirmed whether or not the outer shape of the side airbag 1 in front of and behind the vehicle body satisfies the above-described conditions, without adding any particular structure.

When the side airbags 1 are pressed in the thickness direction (vehicle width direction of the vehicle body), a flat pressed deformation occurs. As shown in Fig. 4, when the vehicle body member 3, such as the door where the displacement occurs, enters the inside of the vehicle body in the vehicle width direction of the vehicle body, the side airbag 1 is supported by the vehicle body 3, P is pressed against the side airbag 1 and the side airbag 1 is pushed upward in the vertical direction of the vehicle body (see arrow D1 in FIG.

This deformation causes an upward displacement in at least the chest protection portion Y extending from the inflection portion C to the lower side line L (see arrow D2 in Fig. 3).

The outer shape of the side airbag 1 in front of and behind the front body is formed by a sewing line and the sewing line is formed along the periphery of the side airbag 1 when the side airbag 1 completes the expansion and expansion Thereby forming a ridge line 8 which is convex outward. That is, the sewing line is a ridgeline 8 which appears convex when the side airbag 1 is inflated.

Next, the operation of the side airbag device for a vehicle according to the present embodiment will be described. 2, the side airbags 1 having the above-described configuration are arranged between the rider P and the vehicle body 3 such as the door, laterally of the rider P by the inflator gas, It can expand and expand.

When the side airbags 1 are inflated and the vehicle body such as a door trim or the like enters the inside of the vehicle body when the side airbags 1 are inflated, the side airbags 1 are pressed against the side airbag 1 Not added.

The lower side line L of the chest protection portion Y is slightly latent below the upper arm portion A of the rider P and the side airbag 1 is slightly latched under the upper arm portion A of the rider P when the side airbag 1 is not deformed by compression, A part of the chest protection portion Y of the airbag 1 can support or slightly lift the upper arm portion A of the occupant P from below. The shoulder protection portion X including the upper side line U upper than the inflection portion C can cover and protect the shoulder portion of the rider P from the side (vehicle width direction of the vehicle body).

On the other hand, when the vehicle body member 3 such as a door trim deeply enters the inside of the vehicle body when the side airbag 1 completes the expansion and expansion, as shown in Figs. 3 and 4, the side airbag 1 A flat pressing force is applied to the side airbag 1.

When the side airbag 1 is pushed and deformed by the vehicle body member 3 such as a door trim or the like, the side airbag 1 is pushed upward in the vertical direction of the vehicle body (see arrow D1) An upward displacement occurs in the chest protection portion Y (see arrow D2). The lower side line L not only lie under the upper arm portion A of the rider P by the upward displacement but also prevent the lower side of the shoulder portion P of the rider P from suddenly bouncing upward It can be pushed up to the position, and can be lifted smoothly. In the lifting operation, the downward inclined portion 7 of the lower side line L does not cause the upper arm portion A to bounce, and the latched behavior of the lower side line L becomes smooth, (A) can be pushed up.

The side airbag 1 being inflated and deployed pushes against the body member 3 while being pressed against the side surface of the chest of the rider P so that the possibility of damaging the chest portion is increased, The upper arm portion A of the rider P is not pressed against the chest portion by the gentle lifting operation of the side airbag 1 and the side airbag 1 is not touched, It can be prevented in advance. The shoulder protection portion X including the upper side line U upper than the inflection portion C is formed so that the shoulder portion of the rider P is sideways as in the case where the entry of the vehicle member 3 such as a door trim is shallow (In the vehicle width direction of the vehicle body).

As described above, in the vehicular side airbag apparatus according to the present embodiment, the side airbags 1 are provided in the collision type in which the body member 3 such as a door trim enters the inside of the vehicle body and the upper arm portion A is lifted. The upper side line L is preferably used by the upper side line L due to the upward displacement generated in at least the chest protection portion Y extending from the curved portion C to the lower side line L, It is possible to push up the upper arm portion A of the upper arm portion P and at the same time to prevent the upper end portion of the lower side line A from being tilted in the collision type in which the body member 3, The side airbag 1 is provided with a positional relation that the rear wheel side L can be disposed around the upper arm portion A of the rider P with respect to the side airbag 1 while the upper side line U is straddled by the shoulder protecting portion X Can protect the shoulder part of phosphorus (P) at all times The upper side line U and the lower side line L are placed between the upper side line U and the shoulder protecting portion X on the side of the upper side line U, The protection function of the rider of the lower side line L is prevented from interfering with each other and the upper arm portion A is lifted according to the collision state so that the protection of the chest portion and the shoulder portion X ) Can be compatible with the shoulder portion.

The side airbag 1 is pressed by the vehicle body 3 such as a door where a displacement is generated in the fully expanded and inflated state and deformed so that at least the chest protection part Y extending from the inflection part C to the lower side line L It is possible to control whether or not the upper arm portion A is lifted by the pressing state of the side airbag 1 by the body member 3 so that the upper arm portion A is prevented from being unnecessarily bounced The upper arm (A) can be lifted only in a necessary collision state.

Since the lower side line L includes the downward inclined portion 7 toward the forward and backward directions of the vehicle body in the vicinity of the curved portion C, the latent behavior of the lower side line L capable of being latched down below the upper arm portion A is smooth .

The side airbags 1 are designed in accordance with the dimensions of the experimental dummy dolls assuming the rider and are designed according to the external dimensions of each of the experimental dummy dolls, The side airbags 1 that satisfy the conditions can be manufactured. Preferably, among the experimental dummy dolls, if it is adapted to the WorldSID 50th, restraint performance can be appropriately obtained for more circumstance.

The shoulder protecting portion X is provided with the shoulder protecting portion X and the upper arm portion A due to the upward displacement of the chest protecting portion Y It is possible to avoid interfering with the raising behavior.

Since the upper side line U includes at least the first curve reaching the curved portion C and the lower side line L includes at least the second curve reaching the curved portion C, And the curvature radius, and it is possible to secure a smooth inflation shape along the periphery of the curved portion C.

The outer shape of the side airbags 1 in front of and behind the vehicle body is designed to be in a state before inflated and in a non-inflated state. When the side airbag 1 completes the unfolding and expansion, the outline shape is defined by the ridgeline 8 appearing convexly by the sewing line.

The ridgeline 8 is formed by the sewing line forming the side airbag 1 and the shape after completion of the expansion and expansion in the state of not being inflated is also predicted to some extent so that it is possible to easily design and manufacture the side airbag 1 accurately .

5 and 6 show a modified example of the vehicular side airbag apparatus according to the embodiment. In this modified example, the inner bag 9 is provided inside the side airbag. Fig. 5 is a side view of the side airbag when the side airbag is deployed flat on the seat and in a non-inflated state, Fig. 6 is a side view of the vehicle when viewed in the vehicle width direction, Fig. 7 is a graph showing the temporal change of the internal pressure. Fig.

As shown in Fig. 5, when the side airbag 1 is divided into the forward and backward directions of the vehicle body, the inner bag 9 is positioned such that a large part of the side airbag 1 is located inside the seat 2 on the rear side, And is installed in the side airbag 1. As a result, the side airbag 1 can be deployed more safely and stably.

Like the side airbag 1, the inner bag 9 is formed by folding the periphery of the opposing bubbles together by sewing or the like, and is expanded and expanded as the inflator gas is filled in the inner bag 9. The inflator (4) is installed inside the inner bag (9).

A vent valve 10 is provided in the inner bag 9 so as to communicate with the inside of the inner bag 9 and the inside of the side air bag 1. The inflator gas introduced into the inner bag 9 is supplied to the inner bag 9 at a time And is introduced into the side airbag 1 with a delay. Thus, the inner bag 9 completes the unfolding expansion prior to the completion of the deployment and expansion of the side airbag 1.

By providing the inner bag 9, for example, as shown in Fig. 6, the inner bag inner pressure Q1 is momentarily increased in the inner bag, the inner bag inner pressure Q1 is gradually lowered thereafter, The side airbag internal pressure Q2, which is lower than the inner bag inner pressure Q1, is obtained in the airbag 1.

Therefore, by virtue of the arrangement of the inner bags 9, it is possible to control the malfunction occurring with respect to the rider P who is not normally seated properly when the side airbag 1 is deployed. Further, the adoption of the inner bag 9 can improve the straightness of the side airbag 1 itself.

In this modified example, the inner bag 9 is positioned inside the seat when the side airbag 1 is inflated and expanded. In the illustrated example, the inner bag 9 has a vertically elongated shape along the vertical direction of the vehicle body and is formed in a shape that widens in the longitudinal direction of the vehicle body downward, for example, in a substantially triangular shape as viewed from the side, Are pushed forward in the front-rear direction of the vehicle body. This makes it possible to reduce the malfunctioning of the rider P who is not seated normally and to prevent the rider P from sitting around the rider's seat 2 sitting on the seat 2 instantaneously and at an appropriate internal pressure It can be supported by the inner bag 9.

5, when the occupant P is in an abnormal position, the vent valve 10 of the inner bag 9 inflows the flow of the inflator gas filled in the ventilator 10 into the vent hole 10 formed in the side airbag 1, (Directing) the light to the light source 11. The vent hole 11 is provided to release the inflator gas after completion of the inflation and expansion of the side airbag 1.

The vent valve 10 may be disposed so as to face the vent hole 11 by directing the flow of the inflator gas from the vent valve 10 to the vent hole 11. In this case, The inflator gas flowing into the side airbag 1 can be immediately discharged directly from the vent hole 11 through the intermediary of the front airbag 10 and the side airbag 1 and the deployment inflating force of the side airbag 1 can be weakened, It is possible to avoid that the binding force of the side airbags 1 is excessively applied to the side airbag P.

It goes without saying that the same operation and effect as the vehicle side airbag device according to the above-described embodiment can be obtained even in the modified example in which the inner bag 9 is incorporated in the side airbag 1.

The above-described vehicle side airbag apparatus is a preferred example of the present invention, and other embodiments can be implemented and carried out by various methods. Particularly, the present invention is not limited to the shape, size, configuration and arrangement of the components of the small-size image shown in the accompanying drawings, unless otherwise specified in the present application. Also, the terms and expressions used in the present specification are for the purpose of explanation, and are not limited thereto, unless otherwise stated.

1 side airbag
2 seats
3 body member
4 Inflators
7 Downward slope part
8 ridges
9 Inner Bags
11 vent hole
A rider's upper arm
Lower end of Au upper arm
C flexion area
D2 upward displacement
F centerline
L bottom line
P rider
U upper line
X shoulder protection
Y Chest Protector

Claims (11)

At least a shoulder protecting portion provided in the seat for protecting the shoulder portion of the rider who normally seated in the seat and a chest protecting portion for protecting the rider's chest portion below the shoulder protecting portion, And a side airbag deployed and inflated toward the forward and backward directions of the vehicle body between the vehicle body members on the side of the seat,
When the side airbags are deployed flat on the seat and are not inflated, the outer shape of the side airbags in front of and behind the vehicle body in the vehicle width direction of the vehicle body, And an upper side line extending upward from the bent portion and a lower side line directed downward from the bent portion, wherein the bent portion has a bent portion that continuously changes in flexion to secure a smooth expansion state,
The upper arm portion is divided into an upper face side and a lower face side with respect to a center line that extends along the longitudinal direction of the upper arm portion and divides into upper and lower portions on the upper arm portion of the rider as viewed in the width direction of the vehicle body,
Wherein the bent portion is located in front of the shoulder protecting portion and above the center line of the shoulder protecting portion with respect to the center line as viewed in the vehicle width direction of the vehicle body and is located adjacent to the upper face side of the upper arm portion from the width direction of the vehicle body,
Wherein the lower side line is positioned so as to intersect from the upper side to the lower side with respect to the center line and to extend from the upper face side of the upper arm portion to the lower face side and adjacent to the upper arm portion from the side in the width direction of the car body, The lower end of the upper arm of the rider is positioned lower than the center line at the elbow joint position and is positioned behind the elbow joint position of the rider in the forward and backward directions of the vehicle body,
Wherein the side airbag is configured to be able to latently beneath the upper arm portion at an elbow joint position of the rider when the inflated and deployed inflated lower airbag is deployed. The method according to claim 1,
The side airbags are pressed by the body member that caused the displacement in the fully expanded and inflated state to cause deformation, and the upward deformation occurs at least in the chest protection portion extending from the bent portion to the lower side line by the deformation Side airbag device. 3. The method according to claim 1 or 2,
Wherein the lower side line includes a downwardly inclined portion toward the forward and backward directions of the vehicle body in the vicinity of the bent portion. 3. The method according to claim 1 or 2,
Wherein the side airbags are designed in accordance with the dimensions of the experimental dummy doll for the experimental dummy doll assuming the rider. 3. The method according to claim 1 or 2,
And the inflection portion is set near the lower end of the shoulder protection portion. 3. The method according to claim 1 or 2,
Wherein the upper side line includes at least a first curve that reaches the curved portion, and the lower side line includes at least a second curve that reaches the curved portion. 3. The method according to claim 1 or 2,
Wherein the outer shape of the side airbag is formed by a sewing line forming the side airbag. 8. The method of claim 7,
Wherein the sewing line is a ridge appearing convexly when the side airbag completes the expansion and expansion. 3. The method according to claim 1 or 2,
An inner bag is provided inside the side airbag,
The inner bag is disposed behind the front and rear of the vehicle body such that a main portion of the inner bag is located inside the seat when inflated and expanded,
And an inflator is installed inside the inner bag. 10. The method of claim 9,
Wherein the inner bag directs a flow of inflator gas filled in the inflator gas to a vent hole formed in the side airbag when the rider is in an abnormal position. 10. The method of claim 9,
Wherein the inner bag is elongated along the vertical direction of the vehicle body and is formed to have a shape that widens toward the lower side in the longitudinal direction of the vehicle body.

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